US7673554B2 - Tie rod-type booster comprising a reinforced sealing ring - Google Patents

Tie rod-type booster comprising a reinforced sealing ring Download PDF

Info

Publication number
US7673554B2
US7673554B2 US11/765,880 US76588007A US7673554B2 US 7673554 B2 US7673554 B2 US 7673554B2 US 76588007 A US76588007 A US 76588007A US 7673554 B2 US7673554 B2 US 7673554B2
Authority
US
United States
Prior art keywords
cup
sealing ring
tubular element
booster
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US11/765,880
Other languages
English (en)
Other versions
US20070295200A1 (en
Inventor
Fabrice Raimbault
Cedric Leboisne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RAIMBAULT, FABRICE, LEBOISNE, CEDRIC
Publication of US20070295200A1 publication Critical patent/US20070295200A1/en
Application granted granted Critical
Publication of US7673554B2 publication Critical patent/US7673554B2/en
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/569—Vacuum systems indirect, i.e. vacuum booster units characterised by piston details, e.g. construction, mounting of diaphragm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/567—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of the casing or by its strengthening or mounting arrangements
    • B60T13/5675—Supportstruts

Definitions

  • the invention relates to a tie rod-type pneumatic brake booster for a motor vehicle.
  • the invention relates more particularly to a tie rod-type pneumatic brake booster for a motor vehicle, of the type which comprises a rigid casing of axial orientation inside which is movably mounted a substantially transverse partition sealingly delimiting a front chamber, subjected to a first pressure, and a rear chamber, subjected to a second pressure varying between the first pressure and a pressure above the first pressure, which is able to act on an actuating rod of a master cylinder associated with the booster, and the movements of which are controlled by intake and equalizing valves for varying the second pressure in the rear chamber, of the type in which the moving partition comprises at least one cup of which at least an annular portion is inclined by a defined angle with respect to the axial direction of the casing, and of which a defined face is covered by a sealing diaphragm connected to the inner periphery of the casting, of the type in which the booster is intended to be fastened to a bulkhead of an associated vehicle by way of tie rods of axial orientation passing through the casing of the
  • the booster is fastened to a mounting plate which is itself fastened to a bulkhead of the vehicle by way of screws or some other fastening means.
  • the booster is fastened directly to the vehicle bulkhead by way of tie rods which pass through the booster casing.
  • Such boosters offer the advantage that they can be easily fastened to a vehicle bulkhead and that they have a reduced weight.
  • the vehicle bulkhead can be equipped with welded tie rods which pass through the booster, said booster being fastened to the bulkhead by way of nuts which are tightened against a front face of the casing.
  • tie rods can be fastened to the booster casing and the booster is fastened by way of nuts which are tightened against the back of the vehicle bulkhead.
  • the fact that the tie rods pass through the booster entails setting up elaborate sealing between the tie rods and the moving wall of the booster.
  • this sealing is provided dynamically by way of a ring oriented parallel to the axial direction, which ring is interposed between each tie rod and the moving wall and is intended to slide on the tie rod.
  • boosters wherein at least an annular portion of the moving wall is inclined by a defined angle with respect to the axial direction of the booster, substantially in a truncated cone shape.
  • This design offers greater rigidity to the moving wall for the same thickness.
  • the sealing ring is thus generally located in the inclined annular portion of the moving wall.
  • the invention provides a booster comprising a reinforced sealing ring.
  • the invention provides a booster of the above-described type, characterized in that the cup comprises, in its inclined annular portion, a tubular element which contains the aperture and which extends at least axially in part around the sealing ring so as to ensure more uniform distribution of the pressures around the sealing ring and limit the deformations of said ring when it is subjected to a pressure difference between the front chamber and rear chamber of the booster.
  • the tubular element is integrally formed with the cup
  • the tubular element is fitted into the cup
  • the sealing ring is integrally formed with the sealing diaphragm
  • the sealing ring comprises an end portion, with a diameter greater than the inside diameter of the tubular element, which is intended to be inserted with deformation into the aperture in the tubular element from the side toward the defined face of the cup and then to project from the tubular element on the side opposed to the defined face in order to axially immobilize the sealing ring
  • the end portion of the sealing ring comprises a chamfer which is intended to facilitate its insertion into the tubular element
  • the defined face of the cup which receives the diaphragm is the rear face of said cup
  • the tubular element protrudes axially toward the front from the front face of the cup
  • the end portion of the sealing ring projects at the front of the tubular element.
  • FIG. 1 is an overall sectional view of a booster produced according to the present invention
  • FIG. 2 is a detail sectional view of the prior art represented in the vicinity of the sealing ring
  • FIG. 3 is a detail sectional view of a booster produced according to the invention represented in the vicinity of the sealing ring.
  • front By convention, the terms “front”, “rear”, “upper” and “lower” respectively denote elements or positions oriented respectively toward the left, the right, the top or the bottom of FIGS. 1 to 3 .
  • FIG. 1 shows the whole of a tie rod-type pneumatic brake booster 10 for a motor vehicle.
  • the booster 10 comprises a rigid casing 12 of axial orientation “A” inside which is movably mounted a substantially transverse partition 14 sealingly delimiting a front chamber 16 , subjected to a first pressure “P 1 ”, and a rear chamber 18 , subjected to a second pressure “P 2 ” varying between the first pressure “P 1 ” and a pressure “P a ” above the first pressure “P 1 ”.
  • the second pressure “P 2 ” which is present in the rear chamber 18 is particularly able to be modified by selectively opening intake and equalizing valves (not shown) so as to cause the movements of the moving partition 14 , so that said moving partition 14 acts on an actuating rod 20 of a master cylinder 22 associated with the booster 10 .
  • the booster 10 is intended to be fastened to a bulkhead 34 of an associated vehicle by way of tie rods 24 of axial orientation which pass through the casing 12 of the booster 10 and through the moving partition 14 .
  • the tie rods are, for example, rigidly connected to the front portion 26 of the casing 12 of the booster 12 and at their rear end 28 have a thread 30 intended to pass through an aperture 32 in a bulkhead 34 of the vehicle in order to allow fastening of the booster by way of nuts 37 tightened against the back 36 of the bulkhead 34 .
  • the moving partition 14 comprises at least one cup 38 of which an annular portion 39 is inclined by a defined angle “ ⁇ ” with respect to the axial direction “A” of the casing 12 .
  • a defined face 40 of the cup 38 is covered with a sealing diaphragm 42 which, as illustrated in FIG. 1 , is connected to the inner periphery 44 of the casing 12 .
  • the cup 38 has an aperture 46 associated with each tie rod 24 , which aperture 46 accommodates a sealing ring 48 .
  • the ring 48 is, on the one hand, fastened to the cup 38 and is, on the other hand, slideably mounted on the associated tie rod 24 .
  • FIG. 2 which represents a conventional booster 10
  • the cup 38 is subjected to forces substantially perpendicular to the inclined surface of said annular portion, whereas the sealing ring 48 has a radial orientation.
  • the inclination of the annular portion 39 of the cup 38 may result in the sealing ring 48 being subjected to relatively high radial pressure variations, a situation which can lead to a local detachment of the ring around the tie rod 24 and thus cause sealing problems between the front chamber 16 and the rear chamber 18 of the booster 10 .
  • the invention provides a booster comprising a reinforced sealing ring 48 .
  • the invention provides a booster 10 of the above-described type, characterized in that the cup 38 comprises, in its inclined annular portion 39 , a tubular element 50 which contains the aperture 46 and which extends at least axially in part around the sealing ring 48 so as to ensure more uniform distribution of the pressures around the sealing ring 48 and limit the deformations of said ring 48 when it is subjected to a pressure difference between the front chamber 16 and the rear chamber 18 of the booster 10 .
  • tubular element 50 two embodiments of the tubular element 50 can be contemplated.
  • the tubular element 50 is integrally formed with the cup 38 .
  • the cup 38 can thus be produced by stamping a steel sheet or by molding a plastic material.
  • the tubular element 50 can also be fitted into the cup 38 .
  • fitting means (not shown) are interposed between the tubular element 50 and the cup 38 .
  • the cup 38 can be produced by stamping a steel sheet or by molding a plastic material
  • the tubular element 50 can be produced by cutting a steel tube or by molding a plastic material.
  • the sealing ring 48 is preferably produced integrally formed with the sealing diaphragm 42 in order to guarantee perfect sealing between the ring 48 and the diaphragm 42 , thereby preventing any air leaks between the front chamber 16 and the rear chamber 18 .
  • the sealing ring 48 comprises an end portion 52 , with a diameter “D” greater than the inside diameter “d” of the tubular element 50 , which, prior to mounting the tie rod 24 , is intended to be inserted with deformation into the aperture 46 in the tubular element from the side toward the defined face 40 of the cup 38 and then to project from the tubular element 50 on the side opposed to the defined face 40 in order to axially immobilize the sealing ring 48 .
  • the end portion 52 of the ring 48 forms a first abutment against the end of the tubular element 50 .
  • the ring 48 is integrally formed with the diaphragm 42 which is applied against the defined face 40 of the cup 38 , the ring 48 is thus immobilized both ways in the axial direction.
  • the end portion 52 of the sealing ring comprises a chamfer 54 which is intended to facilitate its insertion into the tubular element 50 .
  • the defined face 40 of the cup 38 which receives the diaphragm 42 is the rear face of said cup 38
  • the tubular element 50 projects axially toward the front from the front face 56 of the cup 38
  • the end portion 52 of the sealing ring 48 projects at the front of the tubular element 50 .
  • the invention therefore makes it possible to provide optimum sealing between the front chamber 16 and rear chamber 18 of a tie rod-type booster 10 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
US11/765,880 2006-06-21 2007-06-20 Tie rod-type booster comprising a reinforced sealing ring Expired - Fee Related US7673554B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0607600 2006-06-21
FR0607600A FR2902736B1 (fr) 2006-06-21 2006-06-21 Servomoteur a tirants comportant une bague d'etancheite renforcee.

Publications (2)

Publication Number Publication Date
US20070295200A1 US20070295200A1 (en) 2007-12-27
US7673554B2 true US7673554B2 (en) 2010-03-09

Family

ID=37671180

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/765,880 Expired - Fee Related US7673554B2 (en) 2006-06-21 2007-06-20 Tie rod-type booster comprising a reinforced sealing ring

Country Status (5)

Country Link
US (1) US7673554B2 (fr)
EP (1) EP1870306B1 (fr)
JP (1) JP2008024293A (fr)
FR (1) FR2902736B1 (fr)
PL (1) PL1870306T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9457780B2 (en) 2013-06-21 2016-10-04 Advics Co., Ltd. Negative pressure type booster device
US20180362007A1 (en) * 2015-06-29 2018-12-20 Continental Teves Ag & Co. Ohg Pneumatic brake booster having a connecting pin

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016097876A (ja) * 2014-11-25 2016-05-30 株式会社アドヴィックス 負圧式倍力装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479844A (en) * 1992-04-08 1996-01-02 Lucas Industries Public Limited Company Pneumatic booster with electromagnetic servo control, especially for motor vehicle brake systems
US6189437B1 (en) * 1999-08-30 2001-02-20 Robert Bosch Corporation Brake booster having means for mounting on a wall
US6588317B2 (en) * 2001-11-09 2003-07-08 Delphi Technologies, Inc. Power booster sealing mechanism
US6772674B2 (en) * 2002-11-12 2004-08-10 Delphi Technologies, Inc. Tie rod apparatus and method for assembling a vacuum booster
US7096775B2 (en) * 2003-11-28 2006-08-29 Hitachi, Ltd. Pneumatic booster
US7318370B2 (en) * 2005-02-18 2008-01-15 Robert Bosch Gmbh Tie rod for booster and booster comprising such a tie rod
US7322269B2 (en) * 2003-05-14 2008-01-29 Continental Teves Ag & Co., Ohg Housing module for a brake booster

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908516A1 (de) * 1979-03-05 1980-10-16 Teves Gmbh Alfred Bremskraftverstaerker fuer ein kraftfahrzeug
JPS601662U (ja) * 1983-06-17 1985-01-08 アイシン精機株式会社 自動車用負圧式ブ−スタ
DE4202820C2 (de) * 1992-01-31 1996-09-05 Lucas Ind Plc Betätigungseinheit für Kraftfahrzeugbremsen
JP2967378B2 (ja) * 1992-07-21 1999-10-25 日信工業株式会社 負圧ブースタ
DE19523021A1 (de) * 1995-06-24 1997-01-02 Teves Gmbh Alfred Unterdruckbremskraftverstärker für Kraftfahrzeuge
US6755117B2 (en) * 2001-11-09 2004-06-29 Delphi Technologies, Inc. Tandem vacuum booster assembly including sleeve for air transfer between high pressure chambers
DE10334457A1 (de) * 2003-07-29 2005-02-17 Continental Teves Ag & Co. Ohg Bremskraftverstärker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479844A (en) * 1992-04-08 1996-01-02 Lucas Industries Public Limited Company Pneumatic booster with electromagnetic servo control, especially for motor vehicle brake systems
US6189437B1 (en) * 1999-08-30 2001-02-20 Robert Bosch Corporation Brake booster having means for mounting on a wall
US6588317B2 (en) * 2001-11-09 2003-07-08 Delphi Technologies, Inc. Power booster sealing mechanism
US6772674B2 (en) * 2002-11-12 2004-08-10 Delphi Technologies, Inc. Tie rod apparatus and method for assembling a vacuum booster
US7322269B2 (en) * 2003-05-14 2008-01-29 Continental Teves Ag & Co., Ohg Housing module for a brake booster
US7096775B2 (en) * 2003-11-28 2006-08-29 Hitachi, Ltd. Pneumatic booster
US7318370B2 (en) * 2005-02-18 2008-01-15 Robert Bosch Gmbh Tie rod for booster and booster comprising such a tie rod

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9457780B2 (en) 2013-06-21 2016-10-04 Advics Co., Ltd. Negative pressure type booster device
US20180362007A1 (en) * 2015-06-29 2018-12-20 Continental Teves Ag & Co. Ohg Pneumatic brake booster having a connecting pin
US10525954B2 (en) * 2015-06-29 2020-01-07 Continental Teves Ag & Co. Ohg Pneumatic brake booster having a connecting pin

Also Published As

Publication number Publication date
JP2008024293A (ja) 2008-02-07
PL1870306T3 (pl) 2018-01-31
FR2902736B1 (fr) 2009-03-27
EP1870306A1 (fr) 2007-12-26
FR2902736A1 (fr) 2007-12-28
US20070295200A1 (en) 2007-12-27
EP1870306B1 (fr) 2017-09-06

Similar Documents

Publication Publication Date Title
US5410880A (en) Actuator unit for motor vehicle brakes
US7673554B2 (en) Tie rod-type booster comprising a reinforced sealing ring
SK278488B6 (en) The valve assembly for controlling pneumatic brake booster
US4542680A (en) Vacuum booster device
US8955423B2 (en) Pneumatic brake booster
SU1187711A3 (ru) Вакуумный усилитель тормоза
JPH0215425B2 (fr)
US7322269B2 (en) Housing module for a brake booster
US5195421A (en) Vacuum booster
JP2012250663A (ja) 自動車のブレーキ用負圧ブースタ
US7318370B2 (en) Tie rod for booster and booster comprising such a tie rod
GB2087495A (en) Vacuum brake booster
JPS623327Y2 (fr)
US20070295202A1 (en) Brake actuating device
GB2118654A (en) Brake power booster
EP1317364B1 (fr) Servomoteur pneumatique et procede de fabrication dudit servomoteur
JPH0722877U (ja) タンデム型負圧ブースタ
JPS6144536Y2 (fr)
JP6156257B2 (ja) 負圧式倍力装置
JP2633844B2 (ja) アクチエータのケーシング
JPH0235056Y2 (fr)
JPH0575039U (ja) 液圧式倍力装置
JPS6021521Y2 (ja) 空圧作動装置
JP6326978B2 (ja) 負圧式倍力装置
JPS6222661Y2 (fr)

Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RAIMBAULT, FABRICE;LEBOISNE, CEDRIC;REEL/FRAME:019463/0176;SIGNING DATES FROM 20070523 TO 20070525

Owner name: ROBERT BOSCH GMBH,GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RAIMBAULT, FABRICE;LEBOISNE, CEDRIC;SIGNING DATES FROM 20070523 TO 20070525;REEL/FRAME:019463/0176

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RAIMBAULT, FABRICE;LEBOISNE, CEDRIC;SIGNING DATES FROM 20070523 TO 20070525;REEL/FRAME:019463/0176

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.)

LAPS Lapse for failure to pay maintenance fees

Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.)

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20180309